st72324bk STMicroelectronics, st72324bk Datasheet - Page 39

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

ST72323 ST72323L
Table 10.
Table 11.
Bit 5 = IPB Interrupt polarity for port B
Bit 4:3 = IS2[1:0] ei0 and ei1 sensitivity
Table 12.
IS11
IS21
IS11
0
0
1
1
0
0
1
1
0
0
1
1
Bits 7:6 can be written only when I1 and I0 of the CC register are both set to 1 (level 3).
This bit is used to invert the sensitivity of the port B [3:0] external interrupts. It can be
set and cleared by software only when I1 and I0 of the CC register are both set to 1
(level 3).
0: No sensitivity inversion
1: Sensitivity inversion
The interrupt sensitivity, defined using the IS2[1:0] bits, is applied to the following
external interrupts:
–
–
ei0 (port A3..0) as shown in
ei1 (port F2..0) as shown in
IS10
IS20
0
1
0
1
0
1
0
1
Interrupt sensitivity - ei2
Interrupt sensitivity - ei3
Interrupt sensitivity - ei0
IS10
0
1
0
1
Falling edge & low level
Falling edge & low level
Falling edge only
Rising edge only
Falling edge only
Rising edge only
IPB bit = 0
IPA bit = 0
Table 13
Table 12
External interrupt sensitivity
External interrupt sensitivity
External interrupt sensitivity
Rising and falling edge
Rising and falling edge
Falling edge & low level
Rising and falling edge
Falling edge only
Rising edge only
Rising edge & high level
Rising edge & high level
Falling edge only
Rising edge only
Falling edge only
Rising edge only
IPB bit = 1
IPA bit = 1
Interrupts
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